According to the Wikipedia page on Hindu diet, an excerpt from the Atharva Veda (the chronologically last one of the four) says that
Those who eat flesh uncooked, and those who eat the bleeding flesh of men, Feeders on babes unborn, long-haired, far from this place we banish these.
My question is if the religious Hindu texts haven't explicitly prescribed any particular eating preferences, why is this act of eating non-conventional meat (e.g. beef or pork) frowned upon by some of the conservatives?
I've had the opinion that Hinduism is a religion of universal acceptance and the eating habits of a person has got nothing to do with the Hindu religion.
Is this true or does Hinduism have some specific culinary instructions for its followers?